Last name Mornay (Mornay 
, 莫妮 
, เช้า) , all over the world, is a rare cognomen. The surname Mornay is characteristic of France, where it is a rare surname, Singapore, and the United States, where it is a very rare surname. Not in comparison with a country's population, it is commonest in France, the United States, and China. More prevalently, Mornay is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mornay | Namibia, France, Australia, United States, South Africa |
| 莫妮 | China |
| pierre de mornay author (-1306), FR (b. 1150) |
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| étienne de mornay French politician, FR (b. 1250) |
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| charles de mornay FR (b. 1514) |
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| johan de mornay Swedish baron (b. 1568) |
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henri de mornay French military personnel (1623-1706), FR (b. 1623) |
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| louis de mornay French soldier, FR (b. 1619) |
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| rené de mornay FR (b. 1650) |
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charles-edgar de mornay French politician, FR (b. 1803) |
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| charles léonce de mornay French soldier, FR (b. 1792) |
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| marie joseph mauny de mornay (b. 1804) |
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| marie-joseph monny de mornay FR (b. 1804) |
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| augustin de mornay French politician, FR (b. 1831) |
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rebecca de mornay American actress, US (b. 1959) |
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| mornay du plessis South African composer and pianist (1909-1941), ZA (b. 1909) |
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| alain mornay French politician, FR (b. 1953) |
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